Method for preparing casting type nylon/modified graphite oxide nanocomposite

A technology of nano-composite material and cast nylon, which is applied in the field of polymer composite material preparation, can solve the problem that tensile strength, impact strength and heat resistance cannot be improved at the same time, and achieve the increase of tensile strength and impact strength, and the preparation process. Simple, promising results for industrial applications

Active Publication Date: 2013-09-18
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention mainly aims at the deficiency that the tensile strength, impact strength and heat resistance can...

Method used

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  • Method for preparing casting type nylon/modified graphite oxide nanocomposite
  • Method for preparing casting type nylon/modified graphite oxide nanocomposite
  • Method for preparing casting type nylon/modified graphite oxide nanocomposite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Put 0.5g of graphite oxide prepared according to the Hummers method into 200ml of ethanol, ultrasonically disperse for 20 minutes, add 0.5g of hexamethylenediamine, control the temperature at 70°C to 80°C, and protect it with nitrogen. After 3h, filter, wash, Modified graphite oxide was obtained after drying.

[0023] (2) Heat and melt 100g of caprolactam at 70°C to 80°C. Under the protection of nitrogen, take 0.01g of the modified graphite oxide obtained in step (1) and put it into the melt of caprolactam, heat at 70°C to 80°C and ultrasonically After 30 minutes, a suspension of modified graphite oxide caprolactam with good dispersibility was obtained.

[0024] (3) Add all the graphite oxide caprolactam suspension obtained in step (2) into a three-necked flask, distill off water under reduced pressure at 90°C (vacuum degree is 0.9-0.95MPa), add 0.2g of sodium hydroxide, and ℃ under reduced pressure (vacuum degree 0.9-0.95MPa) to distill for half an hour to remove ...

Embodiment 2

[0028] Basically the same as Example 1, only changing the amount of modified graphite oxide in step (2) to 0.05g.

[0029] The performance of the composite material obtained is shown in attached table 2

Embodiment 3

[0031] Basically the same as in Example 1, only changing the amount of modified graphite oxide in step (2) to 0.1 g. attached Figure 4 The test results of the medium dynamic thermomechanical analyzer show that the glass transition temperature is 93.9°C, which is higher than figure 2 The 77.6°C of medium pure nylon increased by 16.3°C.

[0032] The performance of the composite material obtained is shown in attached table 2

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Abstract

The invention discloses a method for preparing a casting type nylon/modified graphite oxide nanocomposite. According to the method, graphite oxide is modified by diamine, and amido is introduced into the graphite oxide, so that an interface action between the graphite oxide and nylon is enhanced, and the mechanical property and the heat performance of the casting nylon are comprehensively improved. The preparation technology disclosed by the invention is simple, and the cost is low; due to the little modified graphite oxide, the impact intensity of the composite is obviously improved; when the hexanediamine modified graphite oxide content is 0.1 percent, the impact intensity of the composite is improved by 62 percent than that of pure nylon, and the tensile strength of the composite is also obviously improved; the glass-transition temperature is up to 93.9 DEG C and is improved by 16.3 DEG C than that of pure nylon, and the heat performance is obviously improved.

Description

technical field [0001] The invention relates to a preparation method of cast nylon / modified nano-graphite oxide composite material, which belongs to the field of polymer composite material preparation. technical background [0002] Cast nylon (MC nylon) is one of the most widely used engineering plastics, it has the advantages of low cost, high output, high reaction rate, high molecular weight and good mechanical properties. However, compared with metal materials, MC nylon still has high elastic modulus, poor low temperature toughness, low impact strength, poor dimensional stability, poor wear resistance and self-lubrication under high load, and low wear rate. Large and other shortcomings limit the application of MC nylon to a certain extent. For this reason, extensive research has been carried out on friction reduction, reinforcement, and toughening at home and abroad. However, most of the traditional modifiers and methods can only improve the properties of MC nylon in one...

Claims

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Application Information

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IPC IPC(8): C08G69/16C08K9/04C08K3/04C08K5/29C08L77/02
Inventor 王月欣吴田田张倩孟清张广林
Owner HEBEI UNIV OF TECH
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